/*	$OpenBSD: opti.c,v 1.9 2011/06/23 16:31:16 deraadt Exp $	*/

/*
 * Copyright (c) 1996 Michael Shalayeff
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */

/*
 * Code to setup 82C929 chipset
 */

/* #define	OPTI_DEBUG	9 */

#include <sys/param.h>
#include <sys/types.h>
#include <sys/kernel.h>
#include <sys/conf.h>
#include <sys/device.h>

#include <machine/pio.h>

#include <dev/isa/isavar.h>

#include <dev/isa/opti.h>

#ifdef OPTI_DEBUG
   int opti_debuglevel = OPTI_DEBUG;
#  define XDEBUG(level, data)	((opti_debuglevel >= level)? printf data:0)
#else
#  define XDEBUG(level, data)	/* ((opti_debuglevel >= level)? printf data:0) */
#endif

int	opti_type = OPTI_C929;	/* XXX only one card can be installed */

#define	OPTI_cd_valid_ift(i)	((i)==OPTI_SONY||(i)==OPTI_PANASONIC||\
					(i)==OPTI_MITSUMI||(i)==OPTI_IDE)

static __inline int OPTI_cd_addr(int);
static __inline int OPTI_cd_irq(int);
static __inline int OPTI_cd_drq(int);
static __inline int OPTI_snd_addr(int);
static __inline int OPTI_snd_irq(int);
static __inline int OPTI_snd_drq(int);
static __inline void opti_outb(u_short, u_char);
static __inline u_char opti_inb(u_short);
static int opti_present(void);

static __inline int
OPTI_cd_addr(a)
	int	a;
{
	switch(a) {
	case 0x320:
		return 0xc0;
	case 0x330:
		return 0x40;
	case 0x340:
		return 0x00;
	case 0x360:
		return 0x80;
	default:
		return -1;
	}
}

static __inline int
OPTI_cd_irq(i)
	int	i;
{
	switch(i) {
	case 5:
		return 0x04;
	case 7:
		return 0x08;
	case 3:
		return 0x0c;
	case 9:
		return 0x10;
	case 10:
		return 0x14;
	case 11:
		return 0x18;
	case -1:
		return 0x00;
	default:
		return -1;
	}
}

static __inline int
OPTI_cd_drq(d)
	int	d;
{
	switch(d) {
	case 3:
	case 5:
		return 0;
	case 6:
		return 1;
	case 7:
		return 2;
	default:
		return 3;
	}
}

#define	OPTI_snd_valid_ift(i)	((i)==OPTI_WSS||(i)==OPTI_SB)

static __inline int
OPTI_snd_addr(a)
	int	a;
{
	switch(a) {
	case 0x220:
		return 0x0;
	case 0x240:
		return 0x3;
	case 0x530:
		return 0x8;
	case 0xE80:
		return 0x9;
	case 0xF40:
		return 0xa;
	case 0x604:
		return 0xb;
	default:
		return -1;
	}
}

static __inline int
OPTI_snd_irq(i)
	int	i;
{
	switch(i) {
	case 5:
		return 0x04;
	case 7:
		return 0x08;
	case 3:
		return 0x0c;
	case 9:
		return 0x10;
	case 10:
		return 0x14;
	case 11:
		return 0x18;
	case -1:
		return 0x00;
	default:
		return -1;
	}
}

static __inline int
OPTI_snd_drq(d)
	int	d;
{
	switch(d) {
	case 3:
	case 5:
		return 0;
	case 6:
		return 1;
	case 7:
		return 2;
	default:
		return 3;
	}
}

static __inline void
opti_outb(port, byte)
	u_short port;
	u_char byte;
{
	outb( OPTI_PASSWD, opti_type );
	outb( port, byte );
}

static __inline u_char
opti_inb(port)
	u_short port;
{
	outb( OPTI_PASSWD, opti_type );
	return inb( port );
}

static int
opti_present(void)
{
	register u_char	a, b;
	int s = splhigh();

	a = opti_inb( OPTI_PASSWD );
	opti_outb( OPTI_PASSWD, 0x00 );
	b = opti_inb( OPTI_PASSWD );
	opti_outb( OPTI_PASSWD, a );

	if (b != 2) {
		opti_type = OPTI_C928;

		a = opti_inb( OPTI_PASSWD );
		opti_outb( OPTI_PASSWD, 0x00 );
		b = opti_inb( OPTI_PASSWD );
		opti_outb( OPTI_PASSWD, a );
	}

	splx(s);

	return b == 2;
}

int
opti_cd_setup(ift, addr, irq, drq)
	int	ift, addr, irq, drq;
{
	int	ret = 0;

	XDEBUG( 2, ("opti: do CD setup type=%u, addr=0x%x, irq=%d, drq=%d\n",
		    ift, addr, irq, drq));

	if( !opti_present() )
		XDEBUG( 2, ("opti: not present.\n"));
	else if( !OPTI_cd_valid_ift(ift) )
		XDEBUG( 2, ("opti: invalid CD-ROM interface type.\n"));
	else if( OPTI_cd_addr(addr) == -1)
		XDEBUG( 2, ("opti: illegal CD-ROM interface address.\n"));
	else if( OPTI_cd_irq(irq) == -1)
		XDEBUG( 2, ("opti: wrong CD-ROM irq number.\n"));
	else if( OPTI_cd_drq(drq) == -1)
		XDEBUG( 2, ("opti: bad CD_ROM drq number.\n"));
	else {
			/* so the setup */
		int s = splhigh();
		register u_char	a, b;

			/* set interface type */
		a = opti_inb( OPTI_IFTP );
		b = (opti_inb( OPTI_DATA ) & 0x20) | 3 ;
		opti_outb( OPTI_DATA,  b );
		opti_outb( OPTI_IFTP, (a & OPTI_SND_MASK) | 2 * ift );
		opti_outb( OPTI_ENBL, 0x80 );

			/* we don't need any additional setup for IDE CD-ROM */
		if( ift != OPTI_IDE )
		{
				/* set address */
			a = opti_inb( OPTI_DATA );
			opti_outb( OPTI_DATA, (a & 0x3f) |
			     (0x40 * OPTI_cd_addr(addr)) );

				/* set irq */
			if( irq != IRQUNK )
			{
				a = opti_inb( OPTI_DATA );
				opti_outb( OPTI_DATA,
					  (inb( OPTI_DATA ) & 0xe3) |
					  OPTI_cd_irq(irq) );
			}

				/* set drq */
			if( drq != DRQUNK )
			{
				a = opti_inb( OPTI_DATA );
				opti_outb( OPTI_DATA,
					  (inb( OPTI_DATA ) & 0xfc) |
					  OPTI_cd_drq(drq) );
			}
		}
		splx(s);
		DELAY(1000);
		ret = 1;
	}

	return ret;
}

int
opti_snd_setup(ift, addr, irq, drq)
	int	ift, addr, irq, drq;
{
	XDEBUG( 2, ("opti: do SND setup type=%u,addr=%x,irq=%d,drq=%d\n",
		    ift, addr, irq, drq));

	if( !opti_present() )
		XDEBUG( 2, ("opti: not present.\n"));
	else if( !OPTI_snd_valid_ift(ift) )
		XDEBUG( 2, ("opti: invalid SND interface type.\n"));
	else if( OPTI_snd_addr(addr) == -1)
		XDEBUG( 2, ("opti: illegal SND interface address.\n"));
	else if( OPTI_snd_irq(irq) == -1)
		XDEBUG( 2, ("opti: wrong SND irq number.\n"));
	else if( OPTI_snd_drq(drq) == -1)
		XDEBUG( 2, ("opti: bad SND drq number.\n"));
	else {
			/* so the setup */
		int s = splhigh();
		register u_char	a;

		if (ift == OPTI_WSS) {
			a = opti_inb(OPTI_IFTP);
			opti_outb(OPTI_IFTP, ((a & ~OPTI_SND_MASK)
				  | (OPTI_snd_addr(addr)*16)) + 1);
			opti_outb(OPTI_ENBL, 0x1a);
		}

		splx(s);
		DELAY(1000);
		return 1;
	}

	return 0;
}